How to Manage Pests

Pests in Gardens and Landscapes

Seasonal development and life cycle—Navel orangeworm

In spring, first- and some second-generation eggs are laid singly on damaged or mummified fruits or nuts that remained on trees after harvest and through the winter. Later generations lay eggs on hulls of newly forming or ripening fruit or nuts. Eggs are white when laid, but turn pink within a few days.

Orangeworm egg
Orangeworm egg

Larva
Larva

Adult orangeworm
Adult orangeworm

Pupa in almond
Pupa in almond

Statewide IPM Program, Agriculture and Natural Resources, University of California
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